I hadn't noticed the difference in pony trucks between the SC version and the CLW as you've mentioned them. Here's another one for you to compare.

This one is in the RMCA collection and it's card record indicates it's a CLW, note inside frame on the pony truck.
The axles on the pony truck are bent sufficiently to pick every switch they encounter, I've removed and straightened them with little success such that we're now considering replacing them.

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